FLAC to M4A
FLAC is the audiophile's favorite for lossless music, but Apple's ecosystem barely touches it — the Music app on iPhone, iPad, and older iTunes versions won't play .flac files at all. Converting to M4A gets your library working across Apple devices. Just be clear on the trade-off: a standard M4A uses lossy AAC, so you shave file size dramatically but discard some audio data permanently. If you want to keep every bit of the original, you'd need M4A using the ALAC (Apple Lossless) codec instead. FluidConvert converts FLAC to M4A free, with no account required.
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Accepts: audio/flac, .flac · Max 1GB · always free
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Simply upload your .FLAC file and we'll convert it to .M4A format — fast, free, and secure.
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How to Convert FLAC to M4A
Upload Your File
Click the upload area above or drag and drop your .FLAC file. We support files up to 1GB, completely free.
Choose Output Format
Select .M4A as your target format. Adjust any conversion settings if needed.
Download Your File
Click Convert Now and wait a few seconds. Once complete, download your converted file instantly.
About FLAC to M4A
Last updated: August 2026
What is FLAC?
FLAC (Free Lossless Audio Codec) compresses audio without discarding any data, so a decoded FLAC file is bit-for-bit identical to the original master recording. It typically shrinks files to about 50-60% of uncompressed WAV size while preserving full quality, which makes it the go-to format for archiving CD rips and buying high-resolution music from sites like Bandcamp and HDtracks. FLAC also stores rich metadata and cover art. Its main drawback is compatibility: it's well supported on Android, Windows, and dedicated music players, but Apple long favored its own lossless format and left FLAC out of the standard iOS Music app.
Why convert to M4A?
M4A is the audio format Apple devices handle natively. If your music lives in FLAC but you want it to play in the Music app on an iPhone or iPad, sync through iTunes, or work in a car system that speaks Apple's formats, M4A is the practical target. It also tends to produce much smaller files when using AAC, which matters when you're loading hundreds of albums onto a phone with limited storage. And unlike raw formats, M4A carries full title, artist, album, and artwork tags so your library stays organized after the switch.
What to expect from the conversion
This depends entirely on the target codec. A standard M4A encodes to AAC, which is lossy: the converter decodes your lossless FLAC and re-compresses it, permanently discarding some audio data to reach a much smaller file. At a high bitrate the difference is inaudible to most listeners, but it is not reversible, and you should keep the original FLAC if it's your only copy. If you instead choose M4A using ALAC (Apple Lossless), the conversion stays fully lossless and identical in quality to the FLAC, but the file size stays large. Either way, converting never improves on the FLAC source.
How FluidConvert handles it
FluidConvert decodes your FLAC and encodes it into an M4A container on secure servers, at a high-quality AAC bitrate by default for broad Apple compatibility and small size. Uploads are encrypted in transit and deleted automatically after processing. It's free with no account required.
Common reasons to convert FLAC to M4A
- Moving a lossless FLAC music collection onto an iPhone or iPad where the Music app won't play FLAC natively
- Shrinking a high-resolution FLAC library into smaller AAC M4A files to fit more albums on a phone
- Converting FLAC purchases from Bandcamp or HDtracks into ALAC M4A to keep lossless quality in an Apple library
- Preparing FLAC audio for a car stereo or Apple CarPlay system that recognizes M4A but not FLAC
- Standardizing a mixed FLAC-and-AAC library on M4A so everything syncs and plays consistently across Apple devices
Frequently Asked Questions
Will I lose quality converting FLAC to M4A?
If the M4A uses AAC, yes — AAC is lossy, so re-encoding your lossless FLAC permanently discards some audio data to shrink the file. At high bitrates most people can't hear the difference, but it isn't reversible. If the M4A uses ALAC (Apple Lossless) instead, the conversion is lossless and sounds identical to the FLAC, at the cost of a much larger file.
Why can't my iPhone just play FLAC directly?
Apple historically excluded FLAC from the standard Music app on iOS, favoring its own ALAC format for lossless audio. While the Files app can play some FLAC files, they generally won't import into your Music library or sync the way Apple formats do. Converting to M4A puts your audio in a container the Music app fully supports for library management and playback.
Can I get a lossless M4A from my FLAC?
Yes, if the M4A is encoded with ALAC (Apple Lossless Audio Codec) rather than AAC. ALAC preserves every bit of the original FLAC, so quality is identical and the process is fully reversible. The trade-off is size: an ALAC M4A stays roughly as large as the FLAC, whereas an AAC M4A is far smaller but lossy.
How much smaller will the M4A file be?
It depends on the codec. An AAC M4A at a typical high bitrate is often a fraction of the FLAC size — a 30MB FLAC track might become 8-10MB. An ALAC M4A stays close to the FLAC's size because it's also lossless. If saving storage on a phone is your goal, AAC delivers the big reduction; if fidelity is paramount, ALAC keeps the size.
Does the conversion keep my album art and tags?
Yes. FLAC and M4A both support embedded metadata, so title, artist, album, track number, and cover art carry over during conversion. Your library stays organized in the Apple Music app after the switch. If a tag looks off afterward, you can edit it directly in your music player since M4A fully supports these fields.